Hex-Shank Centering Bits

Commonly used for pre-drilling holes for hardware using screws (particularly hinges), these self-centering drill bits are easy to adjust.

The set screw in the barrel body is used to adjust the drill bit projection. Travel of the spring-loaded portion of the barrel varies by size and determines the maximum pre-drill depth. Nickel-plated steel construction. Includes a HSS drill bit.

The 1/4" and 5mm sizes are for drilling shelf supports. 1/4" dia. shanks for 5/64" to 9/64" bits, 5/16" dia. for 11/64" to 1/4", and 3/8" for 5mm.